2016 presidential possibilities

CaptionPossible presidential contenders in 2016

Theo Wargo / Getty Images

Though Hillary Clinton said she is "thinking" about a second presidential run, the former secretary of State has reportedly made no decision. But a slew of public appearances, a forthcoming book and support from Super PACs and prominent Democrats suggest another bid is on the horizon.

Though Hillary Clinton said she is "thinking" about a second presidential run, the former secretary of State has reportedly made no decision. But a slew of public appearances, a forthcoming book and support from Super PACs and prominent Democrats suggest another bid is on the horizon. (Theo Wargo / Getty Images)

Sen. Rand Paul's (R-Ky.) profile has been on the rise, speaking out against the Obama administration's drone and surveillance policies. Tapping into his father's libertarian base, the first-term senator placed first in the 2014 CPAC straw poll.

Sen. Rand Paul's (R-Ky.) profile has been on the rise, speaking out against the Obama administration's drone and surveillance policies. Tapping into his father's libertarian base, the first-term senator placed first in the 2014 CPAC straw poll. (Alex Wong / Getty Images)